A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element…
A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the reaction which element undergoes maximum change in the oxidation number?
$\mathrm{S}$
$\mathrm{H}$
$\mathrm{Cl}$
$\mathrm{C}$
Solution
$\mathrm{KClO}_{3}+\mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}+\mathrm{H}_{2}^{+6} \mathrm{SO}_{4} ightarrow \mathrm{K}_{2}^{+6} \mathrm{SO}_{4} +\mathrm{KCl}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$
i.e. maximum change in oxidation number is observed in $\mathrm{Cl}(+5$ to $-1)$
,